CentOS 7.7 IP address prefixed with ::ffff::

Any idea why it shows ::ffff::IP ?
Please provide steps to resolve this.

2698 3 07/25 02:44:05 3 ### Invoke - IP [::ffff:172.16.66.2] is not a trusted ip source
2698 3 07/25 02:44:05 3 ### Invoke - Mode is not a trusted mode [QSDKToken]
2698 3 07/25 02:44:05 3 ### Invoke - Request is a managed service request
2698 3 07/25 02:44:05 3 ### Invoke - Unauthorized Request : POST /ManagedService
2698 4 07/25 02:44:05 4 ### Invoke - IP [::ffff:172.16.66.2] is not a trusted ip source
2698 4 07/25 02:44:05 4 ### Invoke - Mode is not a trusted mode [QSDKToken]
2698 4 07/25 02:44:05 4 ### Invoke - Request is a managed service request
2698 4 07/25 02:44:05 4 ### Invoke - Unauthorized Request : POST /ManagedService
2698 3 07/25 02:44:05 3 ### Invoke - POST /ManagedService : HTTP code ‘Unauthorized’
2698 4 07/25 02:44:05 4 ### Invoke - POST /ManagedService : HTTP code ‘Unauthorized’
2698 4 07/25 02:44:06 4 ### Invoke - IP [::ffff:172.16.66.2] is not a trusted ip source
2698 4 07/25 02:44:06 4 ### Invoke - Mode is not a trusted mode [QSDKToken]